Manufacture of fabrics containing artificial silk



Patented Oct. 14, 1924.

UNITED STATES PATENT OFFICE.

MANUFACTURE OI FABRICS CONTAINING ARTIFICIAL SILK.

No Drawing.

To all whom it may concern:

Be it known that I, WILLIAM MARSHALL, a subject of the Kin of Great Britain, re siding in Cheadl ulme, in the county of Chester and Kingdom of England, have invented certain new and useful Improvements in or Relating to .the Manufacture of Fabrics Containing Artificial Silk, of which the following is a specification.

This invention relates to a process of manufacturing fabrics containing natural cellulose. and artificial silk.

Piece goods containing artificial silk and having a mercerized finish have been made by weaving artificial silk with cotton which been mercerized in the hank, because artificial silks such as viscose, cuprammonium silks, nitro-cellulose or the like are damaged by the ordinary mercerizing process. I According to the present invention, 1 make fabrics from unmercerized or incompletely mercerized yarn (hereinafter referred to as incompletely mercerized yarn and racet'yl cellulose yarn and I then subject the fabric to the action of caustic alkali of mercerizing strength. The operation may be performed under tension in the usual mercerlzing machines, or without tension when a crfping effect is obtained.

I nd that when strong caustic soda is used at a temperature of 15 C. or preferably lower, acetyl cellulose silk exhibits little or no'contraction or loss of lustre and very little 19$ of weight. The effect of strong caustic soda is therefore strikingly difierent from that of the very dilute caustic soda which has been employed in conjunction with various salts for the purpose of sa nifying acetyl cellulose silk.

he dyeing properties of the acetyl cellulose ilk do not appear to be materially affected except that the acetyl cellulose silk acquires more afiinity The hysicalstructure of the mercerized aoety cellulose silk is somewhat altered and the irre lar forms of the filament have largely isappeared and become more or less cylindrical.v A pleasing lustre can be obtained by the treatment. a

I may use caustic soda, of specific gravity 1.24,-but good results have also been obtained for certain direct dyes.

Application filed October 18, 1923. Serial No. 888,419.

, at a specific gravity of 1.30. More dilute the usual arrangements employed in connection with cloth mercerizing machines.

The mercerizing operation should be limited, i. e. the treatment should not be continued beyond the point at which the mercerizing effect is produced, because prolonged treatment may cause saponification of the acetyl cellulose silk.

The fabric is passed rapidly through the strong caustic soda by the continuous process, the ieces are squeezed through rollers, stretche as required and immediately washed in known manner. The caustic soda may be refrigerated.

1 fter washing the goods are soured with cold dilute acid and washed again in cold water till neutral.

By this means, wponification is restricted so as to be substantially absent, i. e. less than one per cent, an amount which is without material influence on the properties of the acetyl cellulose yarn.

The goods may then be treated in the usual way for bleaching,- dyeing, and finishing either in self colour or in a plurality of colours with or without shot effects.

The piece goods may contain dyed am (either aoetyl cellulose or natural cellu ose) in warp or wefit or in both; in this case the yarn should be dyed with a fast dye.

To produce a cr ing effect, the goods which may be special y wovenafor that purpose, if desired, are washed, soured and again washed Without any tension either on the warpor weft.

I declare that what I claim is 1. The process of manufacturing fabrics of mixed artificial silk and mercerized cotton, which comprises weaving the fabric from incompletely mercerized cotton yarn,

and acetyl cellulose yarn, and then subject ing the fabric to the action of a caustic alkali mercerizing agent, wherein the action of such agent upon theacetyl cellulose is substantially prevented. by mainbaining the 1111 Witness whamofflhauve hemunm signed. caustic alkali at meroerizing sfirength m; 10W my name @his 2nd (My @f Uctebew, 1923, in m mmpemtures. the presence 0f two subscribing Witnesses, 2., Fabrics of cotton and met IL cellulose 5 silk which have been trewmd v iizh caustic WILLIAM MARSHALL soda of about 1.2 1 to 1.30 specific gravity Witmwsea: Y at, a temperature 110% higher than abmzfi; JAMEE; HE BERT BKKYDON, 15 C. JOEEPH GHEETEAMQ 

